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Motion sensor/ horn double beeps while driving

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6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHMotion sensor/ horn double beeps while driving

Leading reported evidence

Disconnect battery

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I disconnected the battery that night and let t sit for a day and it seemed to be better.

Motion sensor/ horn double beeps while driving
Read full discussion summary

Leading evidence: 'Disconnect battery' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'passenger door latch micro switch' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Disconnect battery' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 6 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace boxster s engine in

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I received it with a blown engine and swapped a boxster s engine in.

Motion sensor/ horn double beeps while driving

Use standard wd40 and it only last 1 day

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed

First I used standard WD40 and it only last 1 day before beep comes back.

Motion sensor/ horn double beeps while driving

passenger door latch micro switch

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that suspect a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause

Just my sample size, it was the passenger door latch micro switch on mine that's sticky and it would render the system to think the door is not locked when it should be.

Motion sensor/ horn double beeps while driving

Lubricate door lock and it seems

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I have been lubricating the door lock and it seems to solve it for 5-6 months at a time before it comes back.

Motion sensor/ horn double beeps while driving
Frequently discussed actions (6)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Disconnect battery

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I disconnected the battery that night and let t sit for a day and it seemed to be better.

Motion sensor/ horn double beeps while driving

Lubricate door lock and it seems

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I have been lubricating the door lock and it seems to solve it for 5-6 months at a time before it comes back.

Motion sensor/ horn double beeps while driving

Replace boxster s engine in

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I received it with a blown engine and swapped a boxster s engine in.

Motion sensor/ horn double beeps while driving

Replace most commonly failed switch

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I was just reading a thread about how to replace the most commonly failed switch to the latch/lock mechanism.

Motion sensor/ horn double beeps while driving

Use soft top

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

It was my second time using the soft top.

Motion sensor/ horn double beeps while driving

Use standard wd40 and it only last 1 day

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed

First I used standard WD40 and it only last 1 day before beep comes back.

Motion sensor/ horn double beeps while driving
Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

passenger door latch micro switch

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause

Just my sample size, it was the passenger door latch micro switch on mine that's sticky and it would render the system to think the door is not locked when it should be.

Motion sensor/ horn double beeps while driving
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I was hoping to get some input. I�ve been having a variety of door switch/alarm/motion sensor issues. I have a 2001 C4 cabriolet. I received it with a blown engine and swapped a boxster s engine in. It runs and drives fine. But I don�t know a lot of it�s history and it�s spent a couple of stints sitting over the past year and a half; while I swapped it and for this past winter. About two weeks ago is when the alarm issue really popped up. It was my second time using the soft top. Mostly I�ve just driven the car with the hard top. My wife had some trouble with the door(sometimes the passenger window goes back up when you open the door; I know what to do by lightly holding the handle but she just slammed the door). Then when we were driving home it was doing a double beep as we were driving. When I got home, anytime I would open the passenger door it would act really sporadically double beeping a lot and the window would go up and down intermittently. I disconnected the battery that night and let t sit for a day and it seemed to be better. This weekend when I put the car up on jack stands it started doing the double beep just as I was lifting the car. And the passenger door started acting really odd again. And it was double beeping while I was driving in to work this morningg. I know double beeping is usually an issue with the interior motion sensor. However I can�t find much on double beeping while driving. I have an owners manual but it is unfortunately in storage. I suspect that the passenger door latch/switches are going out and maybe that is contributing to my issues. But besides that I�m stumped. I have not had much luck with doing the double press of the key fob to disable the syetem. Anyone have suggestions on where to start?

POST 2Original post

Do you have the center lock switch on the dash and is the red light on? Just my sample size, it was the passenger door latch micro switch on mine that's sticky and it would render the system to think the door is not locked when it should be. When I am driving the vibration would jiggle the switch loose a bit and it would double beep and I see the red light come on the central lock. When it get sticky, I also get the window drop problem, it hesitant to drop or drop and come back up and do weird thing. I have been lubricating the door lock and it seems to solve it for 5-6 months at a time before it comes back. I shoot the lube in the lock mechanism and lock and unlock the door few times and the beep goes away, the windows works correctly. I know I am just waiting for the inevitable that I will have to get it replaced. I would give that a try start from something you have easy access to and eliminate those micro switches one at a time.

POST 3 / ORIGINAL POSTEROriginal post

That actually sounds very likely/similar to what I was thinking. What kind of lubricant did you use and where did you spray? I would love to buy myself a little time before tearing into it. I was just reading a thread about how to replace the most commonly failed switch to the latch/lock mechanism. I�ve never dissected a part like that but it would save a lot of money. It doesn�t look too hard(famous last words).

POST 4Original post

First I used standard WD40 and it only last 1 day before beep comes back. I got some WD40 silicone spray https://www.wd40specialist.com/produ...one-lubricant/ (disclaimer: not associated with WD40 in anyway and use at your own risk ) I shoot into the door latch where I circled in red box in the image I found below.

POST 5 / ORIGINAL POSTEROriginal post

Thanks! I figured silicone lubricant was a good choice.

POST 6Original post

Hi! My troubles began when the passenger side window on my 2004 C4S cab would not drop and the window would smack the top if the door handle was not held up. My very teck savvy / Boxter owner cousin said he would help. He ordered a new microswitch (AliExpress, I believe) and proceeded to swap it out. (Photos of the amazing work attached). All good until on the ride back, the interior light came on so I open and shut the passenger door and it went out but then the current problem started. when I lock the car with the Key FOB, it locks then the 2 beep alert and it unlocks. I need to press it again and it locks. The red light on the locking switch is on permanently and if pressed, it will do the same thing (lock, beep and unlock) with the steady red light on. Any ideas?

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